Top definition
When something is more almost than another something.
Oh well it's almost St-Patties Day, but it's almoster Friday!
by Guillaume 3D March 09, 2009
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2
Someone who wines and dines girls in the attempt of sleeping with them but frequently comes up short.-only to describe the events as an almost success.
Phil: hey how'd things go with christy last night?
Sean: I almost fucked her.
Phil: ahh you suck, youre such an almoster.
by laurence of alaybia February 27, 2011
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